Valve.



PATENTBD JUNE 23, 1908.

R. T. CRANE.

VALVE.

APPLICATION FILED snPT.11,1eo1.

v 4 f i RICHARD T. CRANE, OF CHICAGO, ILLINOIS.

VALVE Specification of Letters Patent.

Patented June 23, 1908.

Application filed September 11, 1907. Serial No. 392,310.

To all whom it may concern:

Be it known that I, RICHARD T. CRANE, a citizen of the United States,residing at Chicago, in the county of Cook; and State of Illinois, haveinvented certain new and useful Improvements in Valves, of which thefollowing is a speciiication.

My invention relates to valves, and has for its primary objects theprovision of a valve which will not stick in its o en position, andwhich may be operated wit more certainty and ease than the valvesheretofore employed. Other objects and advantages will be apparent tothose skilled in the art. One embodiment of the invention as applied toradiator valves is shown in the accompanying drawings, wherein Figure lis a longitudinal section through the Avalve provided with myimprovement, and

Figure 2 is a bottom view of the bonnet of the valve showing the stopfor cooperating with the stop on the stem.

In valves of this general type as heretofore constructed muchinconvenience has been experienced by reason of the valve sticking inits extreme open position, due to the opening of the valve to itsextreme position when cold, and the subsequent expansion of thecontacting parts when heated. When this sticking occurs, the user has nomeans of knowing whether the valve is' in open or closed position, andso is in doubt as to which way to turn the stem. As a result he mayapply an extreme amount of force in the wrong direction, rendering thevalve eX- treniely difficult of operation in the proper direction andstraining the valve parts. My invention is designed to obviate thesedifficulties by the provision of means for stopping the opening of thevalve in such a manner that no sticking of the valve in open positioncan occur. Then in case the valve sticks against a twisting of the stemin both directions, the user knows that the valve is in closed positionand so is informed which is the proper direction in which to turn thestem.

Referring to the drawing, l is the valve body provided with the seat 2,3 is the bonnet, screw threaded to the body in the usual way, 4 is aunion secured to the valve body as shown, 5 is the gland seated upon thetop of the bonnet, 6 is the stem provided at its upper end with thehandle 7 and having the threaded ortion 8 lengaging the bonnet, and 9 isthe zfisk in which the lower end of the valve stem is swiveled in theusual manner. Upon the valve stem 6 just above the disk 9, the stop 10is provided, which stop is adapted to contact with the stop l1 (Figure2) projecting from the lower surface of the bonnet. The purpose of thisstopping arrangement is to prevent the disk from being raised to such apoint that it jams against the valve casing. In valves as heretoforeconstructed such engagement between the disk and the casing occurs andwhen the valve is opened cold and subsequently heated the expansion ofthe parts causes the disk to stick 1n its open position with the resultas heretofore set forth. It will be a parent that in applicantsconstruction all3 binding or sticking is avoided, as the only parts incontact are the stop members l0 and 1l, and as these parts contact attheir sides, they are free to move vertically past each other and noamount of eX- pansion or contraction will result in sticking when thevalve is in open position. When the stem resists turning in bothdirections, the user is advised that the valve is in closed position,and consequently knows which is the proper direction in which to turnthe stem.

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent is the following 1. Incombination in a radiator valve, a body provided with a valve seat, abonnet secured thereto and provided with a projecting stop member at itslower side, a valve Stem threaded through the bonnet and carrying at itslower end a valve disk, and a stop secured to the stem above the diskand adapted to engage the sto member along a surface substantiallyarailel to the axis of the stem when the dis is in open position,whereby binding due to changes in temperature is avoided when the diskis in open position.

2. In combination in a radiator valve, a casing provided with a bonnet,a valve stem threaded in the bonnet and provided with a disk, a stopmember in the casing beneath the bonnet, and a stop carried by the sternand adapted to contact with the side of the stop member when the disk isin open position.

3. In combination in a valve, a casing, a

. side of the stop on the stern When the diskis In testimony whereof Ihave hereunto signed my name in the presence of the tWo subscribedWitnesses.

RICHARD T. CRANE.

Witnesses:

A. M. HAUsER, CHAs. A. G. WAYMAN.

in open position, and to clear such stop and be carried to a planetherebeneath When moved to closed position.

